EP0809231A3 - Driving circuit and method for ferroelectric liquid crystal device - Google Patents

Driving circuit and method for ferroelectric liquid crystal device Download PDF

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Publication number
EP0809231A3
EP0809231A3 EP97303365A EP97303365A EP0809231A3 EP 0809231 A3 EP0809231 A3 EP 0809231A3 EP 97303365 A EP97303365 A EP 97303365A EP 97303365 A EP97303365 A EP 97303365A EP 0809231 A3 EP0809231 A3 EP 0809231A3
Authority
EP
European Patent Office
Prior art keywords
liquid crystal
ferroelectric liquid
electrodes
signals
crystal device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97303365A
Other languages
German (de)
French (fr)
Other versions
EP0809231A2 (en
Inventor
Mitsuhiro Shigeta
Jonathan Rennie Hughes
Paul Bonnett
Edward Peter Raynes
Akira Tagawa
Michael John Towler
Harry Garth Walton
David Scattergood
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UK Secretary of State for Defence
Sharp Corp
Original Assignee
UK Secretary of State for Defence
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UK Secretary of State for Defence, Sharp Corp filed Critical UK Secretary of State for Defence
Publication of EP0809231A2 publication Critical patent/EP0809231A2/en
Publication of EP0809231A3 publication Critical patent/EP0809231A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3622—Control of matrices with row and column drivers using a passive matrix
    • G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3692—Details of drivers for data electrodes suitable for passive matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/066—Waveforms comprising a gently increasing or decreasing portion, e.g. ramp
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

A ferroelectric liquid crystal device comprises a layer of ferroelectric liquid crystal material contained between a pair of substrates (12,20), a first plurality of electrodes (16) and a second plurality of electrodes (22) defining a plurality of addressable liquid crystal pixels. A driving arrangement is provided for applying a first signal (Strobe) in succession to the first plurality of electrodes (16) and for applying a plurality of second signals (Data) simultaneously to the second plurality of electrodes (22). The plurality of second signals are arranged to comprise non-rectangular wave signals which have a lower harmonic content than a rectangular wave. Non-uniform heating of the device as a result of the application of the second signals (Data) is reduced with consequent improvement in device performance.
EP97303365A 1996-05-17 1997-05-16 Driving circuit and method for ferroelectric liquid crystal device Withdrawn EP0809231A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9610313A GB2313224A (en) 1996-05-17 1996-05-17 Ferroelectric liquid crystal device
GB9610313 1996-05-17

Publications (2)

Publication Number Publication Date
EP0809231A2 EP0809231A2 (en) 1997-11-26
EP0809231A3 true EP0809231A3 (en) 1997-12-03

Family

ID=10793847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97303365A Withdrawn EP0809231A3 (en) 1996-05-17 1997-05-16 Driving circuit and method for ferroelectric liquid crystal device

Country Status (4)

Country Link
US (1) US6215533B1 (en)
EP (1) EP0809231A3 (en)
JP (1) JPH1054974A (en)
GB (1) GB2313224A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6377235B1 (en) * 1997-11-28 2002-04-23 Seiko Epson Corporation Drive circuit for electro-optic apparatus, method of driving the electro-optic apparatus, electro-optic apparatus, and electronic apparatus
US7177783B2 (en) * 2002-06-07 2007-02-13 Cadence Design Systems, Inc. Shape based noise characterization and analysis of LSI
JP4846999B2 (en) * 2004-10-20 2011-12-28 株式会社 日立ディスプレイズ Image display device
JP5090628B2 (en) * 2005-03-03 2012-12-05 株式会社ジャパンディスプレイイースト Method for driving organic EL device and display device
JP2011013574A (en) * 2009-07-03 2011-01-20 Hitachi Displays Ltd Image display device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2193366A (en) * 1986-07-18 1988-02-03 Stc Plc Display device
JPH0267521A (en) * 1988-09-02 1990-03-07 Canon Inc Ferroelectric liquid crystal cell
EP0397260A1 (en) * 1989-05-11 1990-11-14 Koninklijke Philips Electronics N.V. Passive display device
EP0464807A2 (en) * 1990-07-06 1992-01-08 SELECO S.p.A. Circuit generating driving signals for display
EP0701241A1 (en) * 1994-09-12 1996-03-13 Canon Kabushiki Kaisha Driving method for liquid crystal device

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2064194B (en) * 1978-02-08 1982-08-04 Sharp Kk Matrix type liquid crystal display device
GB2034953B (en) * 1978-10-25 1982-10-27 Sharp Kk Mos Fet Array drive for liquid crystal matrix display
GB2118346B (en) * 1982-04-01 1985-07-24 Standard Telephones Cables Ltd Scanning liquid crystal display cells
US4655561A (en) * 1983-04-19 1987-04-07 Canon Kabushiki Kaisha Method of driving optical modulation device using ferroelectric liquid crystal
JPS61163324A (en) * 1985-01-14 1986-07-24 Canon Inc How to drive a liquid crystal cell
JPS61223793A (en) 1985-03-29 1986-10-04 松下電器産業株式会社 Driving of liquid crystal matrix display panel
US4923285A (en) 1985-04-22 1990-05-08 Canon Kabushiki Kaisha Drive apparatus having a temperature detector
GB2207272B (en) 1987-07-18 1991-08-14 Stc Plc Addressing liquid crystal cells
GB8808812D0 (en) * 1988-04-14 1988-05-18 Emi Plc Thorn Display device
FR2656757B1 (en) * 1989-12-28 1992-03-20 Thomson Consumer Electronics METHOD FOR ADDRESSING EACH COLUMN OF A MATRIX TYPE LCD SCREEN.
GB9017316D0 (en) 1990-08-07 1990-09-19 Secr Defence Multiplex addressing of ferro-electric liquid crystal displays
US5170271A (en) * 1991-01-31 1992-12-08 Hughes Aircraft Company Shaped voltage pulse method for operating a polymer dispersed liquid crystal cell, and light valve employing the same
US5489918A (en) * 1991-06-14 1996-02-06 Rockwell International Corporation Method and apparatus for dynamically and adjustably generating active matrix liquid crystal display gray level voltages
JPH0580297A (en) * 1991-09-19 1993-04-02 Fuji Photo Film Co Ltd Matrix driving method of plane type display device
GB9404356D0 (en) 1994-03-07 1994-04-20 Secr Defence Temperature compensation of ferroelectric liquid crystal displays

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2193366A (en) * 1986-07-18 1988-02-03 Stc Plc Display device
JPH0267521A (en) * 1988-09-02 1990-03-07 Canon Inc Ferroelectric liquid crystal cell
EP0397260A1 (en) * 1989-05-11 1990-11-14 Koninklijke Philips Electronics N.V. Passive display device
EP0464807A2 (en) * 1990-07-06 1992-01-08 SELECO S.p.A. Circuit generating driving signals for display
EP0701241A1 (en) * 1994-09-12 1996-03-13 Canon Kabushiki Kaisha Driving method for liquid crystal device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 253 (P - 1054) 30 May 1990 (1990-05-30) *

Also Published As

Publication number Publication date
GB2313224A (en) 1997-11-19
EP0809231A2 (en) 1997-11-26
US6215533B1 (en) 2001-04-10
JPH1054974A (en) 1998-02-24
GB9610313D0 (en) 1996-07-24

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